Yan explains what happens if one person lets go in term of Newton’s first law of motion. So, there must be a centripetal force pulling inwards on anything moving in a circle. For the cup of ...

Gravitational attraction provides the centripetal force needed to keep a planet in orbit around the Sun, and a satellite in orbit around a planet. For example, gravitational attraction between the ...

The Lagrange Points are celestial equilibrium zones, where the combined gravitational pull of two massive bodies equals the centripetal force that keeps a smaller object in rhythmic motion.